Operating mechanism for lifting-jacks.



E. T. ALYEA.

OPERATING MECHANISM FOR LIFTING JACKS.

APPLICATION FILED JAN. 30, 1914.

X1115 Patented. Apr. 13, 1915x Z SHEBTSSKEET 1.

THE NORRIS Flirt-R5 1:0 PHOTO-LITHQ. ASH/N6 TONID E. T. ALYEA.

OPERATHVG- MECHANISM FOR LlFTlNG JACKS. APPLICATION man 1AN.30'. 1914.

Patented. Apr. 13,1915.

' 2 SHEETS-SEEET 2.

THE NORRIS PETERS co.. PHOTO-LITHLI. WASHINGTON, D. c.

EIVIERY 'I. ALYEA, 0F MINNEAPOLIS, MINNESOTA.

OPERATING MECHANISM FOR LIFTING-JACKS.

Application filed January 30, 1914.

To all whom it may concern:

Be it known that I, EMERY T. ALYEA, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Operating Mechanism for Lifting-Jacks; and 1 do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved lifting jack, intended for general use, but especially adapted for use in lifting car journal boxes, with respect to the wheel journals, in order that the bearing brasses may be removed therefrom.

To the above ends, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts, throughout the several views.

Referring to the drawings :Figure 1 is a view, partly in elevation and partly in vertical section, of a car wheel, journal box and a rail, having applied thereto, in workiiig position, the improved lifting jack; Fig. 2 is a view, principally in vertical section, taken on the line m m of Fig. 1; Fig. 3 is a view, partly in plan and partly in horizontal section, taken on the line 00 00 of Fig. 1; Fig. 4 is a view, partly in elevation and partly in vertical section, taken on the line :0 w of Fig. 2; Fig. 5 is a view, principally in elevation, some parts being sectioned on the line 00 m of Fig. 2, and on the irregular line 00 r of Fig. 3; Fig. 6 is a perspective view of the operating lever removed from the jack, some parts being broken away; and Fig. 7 is a detail view, partly in vertical section, taken on the line m m of Fig. 5.

The numerals 1 and 2 indicate, respectively, one of the ties and one of the rails of a railway track; and the numerals 3 to 6, inclusive, indicate, respectively, a car wheel, its journal, journal box, and the bearing Specification of Letters Patent.

Serial No. 815,357.

brasses. The parts just enumerated have been illustrated simply for the purpose of showing the improved lifting device applied in working position.

Referring now to the improved lifting jack, the numeral 7 indicates a cylindrical casing having a contracted neck extension 8 and an integrally formed hand piece 9. The bottom of the casing? is open, and diametrically opposite its hand piece 9 is a flanged rectangular opening 10. The casing 7 rests on a base 11 having, on its upper surface, an annular flange 12 telescoped into said casing and detachably secured thereto by a set screw 12 Mounted within the casing 7 is a vertically extended jack screw 13, having its lower end loosely journaled in a bearing block 14 resting on the base 1 within its flange 12. Keyed to the lower end portion of the screw 13 is a bevel gear 15, which rests on bearing balls 16 mounted in a ballrace formed in the block 14. A collar 17 on the screw 13 rests on the gear 15, and supports said screw on said gear.

Telescopically mounted in the neck 8 is a vertically movable headed plunger 18. The body of the plunger 18 is cylindrical in form, and has screw-threaded engagement, at 19, with the screw 13, which works therein. A set screw 20, having screw-threaded engagement with the neck 8, extends into a vertically extended slot 21 formed in the plunger 18, and thereby holds the same against rotary movement, but free for vertical sliding movement in said neck.

The opening 10 in the casing 7 is closed .by a cover 22 detachably secured to the rectangular flange, surrounding the opening 10, by machine screws. At the intermediate portion of the cover 22 is formed a hub 23, in which is journaled a horizontally extended shaft 24. Bearing rollers 25 are interposed between the hub 23 and shaft 24. Rigidly secured to the end of the shaft 24, which projects into the casing 7, is a bevel gear 26 which meshes with. the bevel gear 15. Mounted on the shaft 24, outward of the hub 23, is a motion-reversing device coinprising a pair of bevel gears 27 and 28,

Patented a is, 1915..

turned face to face, and each meshing with a pair of diametrically opposite bevel pinions 29. The gear 27 is loosely mounted on the shaft 24, and the gear 28 is keyed for rotation therewith. The pinions 29 are loosely journaled within a casting 30 which surrounds the shaft 24, between the gears 27 and 28, said casting 30 being rigidly secured to the cover 22 by bolts 31.

- A pair of ratchet wheels 32 and 33, identical one with the other, are keyed, respectively, one to the shaft 24, and the other to the reduced end of the hub of the gear 27.

. Cooperating with each of these ratchet wheels 32-33 is a driving dog 34. Both of these driving dogs 34 are loosely and intermediately pivoted on a common pin 35, an-

chored, at its ends, to the prongs of a bifurcated lever head 36. The prongs ofthis head 36 are loosely journaled, one on the shaft 24, and the other on the hub of the gear 27 Detachably secured to the head 36 by a bayonet joint is an operating lever 37, having a curved flattened outer end, adapting said lever'for use as a pinch bar, when removed from said head. A single spring-pressed friction bolt 38, mounted in a socket 39 in the head 36, is provided. for holding either one or both of the dogs 34in inoperative povsitions. To permit freeoperative oscillatory movements of the-dogs 34. their rear ;.ends are notched, at 40, in orderto afford clearance for the friction bolt 38.

'The cooperating ratchet wheels 32-33 and the dogs 34 are so arranged as to be operative under a downward pull on thelever 37. With thedogs set as shown in Fig.

5, the shaft 24 will be rotated, under a downwardpull on the lever 37, in a direction to rotate theiscrew 13, for lowering the plunvger18. 'By reversing this position of the ,dogs, and pulling downward on the lever 37 the screw 13 will be rotated in a direction to a raise the plunger 18.

' To lock-the wheel 3 to the rail 2, against lifting movement at the time the. journal .box 5 is being raised by the jack, I provide a ,clarnp of--novel construction. This clamp comprises a pair of opposing jaws 41 and 42, ,engageable, respectively, with the tread Qfl'ange of thewheel 3 and the ball of the rail 2 ](see Fig. 1). The jaw 41 is provided with T -head extension 43 mounted in a guide- -way 44, for ,both pivotal and vertical sliding 5a movements. This'guideway 44is integrally formedwith the casing 7, and the T-head extensions-43 re-acts against the jack as a base of resistance, to holdthe jaws 41-42 onto the wheel-3., and rail 2. The jaw 42 is provided with a lateral extension 45, which ,works vertically through an :opening 46 formed in the intermediate portion of the aw .141. QFOrmed onthe jaw;4l, andextend- 'ing into the opening 46, is a pair of reversely formed upper and lower cutting edges 47, so arranged as to bite or clamp opposite edges of the jaw extension 45, under a separating angular movement of said jaws, in respect one to the other. I

Mounted on the jaw extension 45 is a coiled spring .48 compressed between the jaw 41 and a pin 49. This pin 49 may be inserted through any one of a plurality of longitudinally spaced perforations 50 formed in the jaw extension 45, depending on the amount of tension desired to be placed on the said spring. This spring 48 not only tends to move the jaws 4142 toward each other, but holds the same in initial biting engagement, one with the other.

By pivotally and slidably connecting the jaw 41 to the jack, said jaws will not be disturbed, in case the jack settles under a lifting strain. In case a journal box to be lifted does not come directly over a t1e, on which the jack may be placed, as a support therefor, a short plank 51 may be placed on two or more of the adjacent ties. A Spacing blocks 52 are interposed between the head of the plunger 18 and the bottom of the journal dogs pivotally mounted on said driving head for cooperation, one with each of said ratchet wheels.

.3. The combination with a shaft, of two ratchet wheels, one loose and the other fixed,

. on said. shaft, motion-reversing gears con- ;necting .said loose ratchet wheel with said shaft, a lever-actuated driving headjournaled on said-v shaft, .a pair of driving dogs .pivotallymounted on said driving headfor cooperatiomone with eachof said ratchet :wheels, and neansfor independently holdingsa-id driving dogs in inoperative positions.

j,4.TThe combination with a-shaft, of two ratchet wheels, one loose and the other fixed, .onsald shaft, motion-reversing gears con- -nect1ngsa1d loose ratchet wheel with said shaft, a driving head journaled on said shaft, a lever secured to said head by a bayornet oint, a pair of driving dogs pivotally 'mounted on saidjhead for cooperation, one

with each of saidratchet wheels, and means "for independently holding said driving dogs in inoperative positions.

Laramie 5. The combination With a shaft, of two ratchet Wheels, one loose and the other fixed, on said shaft, and a motion-reversing device connecting said loose ratchet Wheel With said shaft and comprising a pair of bevel gears, placed face to face and rigidly secured, one to said loose ratchet Wheel and the other to said shaft, and a bevel pinion j ournaled on a In testimony whereof I aflix my signature in presence of two Witnesses.

EMERY T. ALYEA. Witnesses EMILY MAY KING, HARRY D. Kmeorm.

fiopies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. G. 

